Question about 2003 Chevrolet Monte Carlo

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How do i replace a anti-theft relay for a 2003 chevrolet monte carlo?

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Not sure what you mean this car doesn't have an (antitheft relay) it has a BCM that receives resistance data from ignition switch and when the data matches programming then car will start. if the data is changed or not reading then the car will not start and security light will flash BCM will shut down starter and fuel delivery. if the security light flashes when you attempt to start the car. the security sensor in the ignition switch will need to be replaced and programmed to the BCM. this is very common problem to these cars.

Posted on Sep 26, 2009

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Posted on Jan 02, 2017

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My car wont start ,how do I reset the theft system on a 1999 monte carlo


Is the theft light on the dash lit ? If so turn the key onto the run position till the theft light goes out, about 10min. Turn key off for a few min. then start , hope that helps. If not have to have it checked for codes in the (BCM) body control module or the (PCM) powertrain control module !

Dec 21, 2014 | 1999 Chevrolet Monte Carlo

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98 monty carlo / wont start unless the ignition module fuse is disconnected. already put another ignition module and coil pack on . tried another computer too.


Is there a light that says SECURITY somewhere on the dash? These cars are notorious for failing anti theft systems that lock out the starter. This link explains and offers DO IT YOURSELF solutions.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 Monte Carlo with VATS and Passlock issues.

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1 Answer

Replace ignition in 1996 monte carlo, now it will not turn over


By replacing the ignition you have interrupted an important part of the anti theft security system. Read this link for help and solutions. http://vatspasslockpasskeysecurityhelp.yolasite.com/

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1 Answer

I have 2003 Monte carlo when its hot outside and sun beating down on it, I turn the key and nothing happens. I have to try several times then it starts.


Next time this happens, check out the dash and see if there is a light on somewhere that says SECURITY. When the anti theft begins to fail, it can disable your starter making the ignition seem like its doing nothing. If you see the security light when this happens then id say 100% that this your problem. This link explains it and gives you some DO IT YOURSELF fix it options. http://vatspasslockpasskeysecurityhelp.yolasite.com/

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May 15, 2011 | 2003 Chevrolet Monte Carlo

1 Answer

My 2003 monte carlo wont start after maybe 30 mins of driving


please be more specific --- will not start after ???

Dec 11, 2009 | 2003 Chevrolet Monte Carlo

1 Answer

2002 chevy monte carlo won't start


this vehicle is equipped with a factory anti theft system if when you try to start the engine and the anti theft light is on then the starter won't start even if your check engine light is not on you would have to scan the body module to pin point the problem to see if it's the anti theft system or the starter, go to a auto parts store like auto zone or pep boys or western auto these store offer free scanning to there customers. if this information has been helpful please let use know good luck

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1 Answer

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There are 2 wires in side the steering column they are white one of them may have broke.

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1 Answer

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disconnect battery for 24 hrs so the computer will reset and if that dont work take it to chevy dealer and have them reset it manually

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